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Table 2 Comparison of the number of multiplications between the previous and the proposed schemes according to N

From: Iterative detection for frequency-asynchronous distributed Alamouti-coded (FADAC) OFDM

N Previous (frequency domain) Proposed (time domain) Proposed/previous
64 4096 1024 0.25
128 16,384 2304 0.14
256 65,536 5120 0.07
512 262,144 11,264 0.04
1024 1,048,576 24,576 0.02